Lith. Sur. Dep. Cairo.

[Larger illustration] (300 kB)

No.1.Victoria Nile upstream of Ripon falls
No.2.Kagera River within 10 km. of mouth
No.3.Semliki River about 50 km. upstream of Albert Lake
No.4.Albert Nile at Wadelai.
No.5.Asua River about 2 km. above junction with Nile.
No.6.Albert Nile at Gondokoro.
No.7.Albert Nile at Mongalla
No.8.Albert Nile above Lake Nô
No.9.Bahr el Ghazal 51 km. from mouth
No.10.Bahr el Zeraf 20 km. from mouth
No.11.Albert Nile 4 km. above junction with Sobat
No.12.Sobat River at Doleib Hills
No.13.White Nile 14 km. below Taufikia

The principal tributaries of the Victoria Nile are the following:—

On the right bank, the Gogonia, the marshy Kwania and Lenga, and the Duki. And on the left bank; the lake-like Sensiwa; the Kafu with its numerous feeders, large catchment basin but generally insignificant discharge; and the Titi. The Uganda rivers are more like sponges than rivers, and in all probability the tail of the Victoria Nile has a discharge only slightly in excess of that at the head.

11. The Semliki River.

—The Semliki river has its sources in Lake Edward just south of the Equator and flows into the southern end of Lake Albert, just as the Victoria Nile flows into the northern end. Lake Edward with the addition of Lake Dueru has an area of some 2500 square kilometres and lies about 965 metres above sea level. Its waters as described by Sir William Garstin, are green in colour and brackish. The Semliki river discharges the surplus waters of the lake, and may be considered as having a discharge of 100 cubic metres per second as a minimum and 400 cubic metres per second as a maximum. In some 120 kilometres of its length this river traverses the eastern end of the Congo forest, and the day may not be far distant when this timber will be floated down the Semliki, towed across Lake Albert and sent down the Albert Nile to Gondokoro and Khartoum. The fall of the Semliki, according to accepted levels is 285 metres in 260 kilometres. The feeders of Lake Edward are the following:—

On the west, none.

On the south, the Rutshuru and Ruendu.